Pin turbo extension version to 9d27b60

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013j6ePxd1BobZkr8YVLnNet

Author: ondrejmirtes

src/Turbo/TurboExtensionEnabler.php

@@ -56,7 +56,7 @@ final class TurboExtensionEnabler
 	 * version is the short SHA of the last commit touching turbo-ext/src/,
 	 * enforced by the phar.yml turbo-version job.
 	 */
-	public const EXPECTED_EXTENSION_VERSION = '5876433';
+	public const EXPECTED_EXTENSION_VERSION = '9d27b60';
 
 	private static bool $typeCombinatorCacheEnabled = false;